Balancing Equations & Types of Reactions

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What is a synthesis reaction?

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A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product. Example: 2 H₂ + O₂ → 2 H₂O.

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What is a decomposition reaction?

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A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. Example: 2 H₂O → 2 H₂ + O₂.

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What is a combustion reaction?

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A combustion reaction is a type of chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat. Example: C₂H₄ + 3 O₂ → 2 CO₂ + 2 H₂O.

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What is a single displacement reaction?

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A single displacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: Zn + 2 HCl → ZnCl₂ + H₂.

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What is a double displacement reaction?

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A double displacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: AgNO₃ + NaCl → AgCl + NaNO₃.

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What are coefficients in a chemical equation?

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Coefficients are the numbers placed in front of the compounds in a chemical equation to indicate the number of molecules or moles of each substance involved in the reaction.

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What are subscripts in a chemical formula?

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Subscripts are the small numbers written to the lower right of an element symbol in a chemical formula, indicating the number of atoms of that element in a molecule. Example: In H₂O, the '2' is a subscript indicating there are two hydrogen atoms.

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How do you balance a chemical equation?

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To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

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What is the balanced equation for the reaction of aluminum and oxygen to form aluminum oxide?

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4 Al + 3 O₂ → 2 Al₂O₃.

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What is the balanced equation for the reaction of sulfuric acid and sodium nitrite?

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1 H₂SO₄ + 2 NaNO₂ → 2 HNO₂ + 1 Na₂SO₄.